Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

There are no annotations, so the description carries the full disclosure burden. It adds the privacy-relevant trait 'No identifiers are retained,' which is useful, but it omits the output shape, side effects, and whether all inputs are equally ephemeral. This is adequate but has clear gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two short sentences and front-loads the core action. Both sentences earn their place, though the second is a privacy guarantee rather than purpose elaboration.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 9-parameter, optional-input tool with no output schema and no annotations, the description is too thin. It does not explain what classification output to expect, how the parameters are combined, or why this tool is needed alongside many sibling tools.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100% and each parameter has its own description in the schema, so the baseline is 3. The tool description itself adds no parameter-level meaning, leaving all semantic weight to the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description states the tool will 'Show how this request is classified,' giving a verb and object, but it never defines what classifications exist or what 'compatibility' means. It does not name sibling tools or scope the classification criteria, so an agent cannot tell this apart from related tools like domain-shape or validate-json.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

No usage guidance is provided. There is no statement about when to call compatibility over sibling tools, which inputs select the desired classification, or any exclusions. An agent must guess when and how to use this tool.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.